Abstract
In this paper, in order to develop a simple and high efficient ballast without an external ignitor, a half-bridge type ballast with a coupled inductor and a frequency controlled synchronous rectifier is proposed. The internal LC resonance of the buck converter is used to generate a high voltage pulse for the ignition, and the coupled inductor filter is used for steady state ripple cancellation. Also, a synchronous buck converter is applied for the DC/DC converter stage. In order to improve the efficiency of the ballast, a frequency control method is proposed. This scheme reduces a circulation current and turn off loss of the MOSFET switch on the constant power operation, which results in increase of the efficiency of the ballast system about 4 %, compared to a fixed frequency control. It consists a 2 stage version ballast with a PFC circuit. The results are verified with hardware experiments.
| Original language | English |
|---|---|
| Pages | 973-977 |
| Number of pages | 5 |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | 19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004 - Anaheim, CA., United States Duration: 2004 Feb 22 → 2004 Feb 26 |
Other
| Other | 19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004 |
|---|---|
| Country/Territory | United States |
| City | Anaheim, CA. |
| Period | 04/2/22 → 04/2/26 |
Keywords
- 2-stage ballast
- Coupled inductor
- Frequency control
- Synchronous rectifier
ASJC Scopus subject areas
- Electrical and Electronic Engineering